CWD Safety Standards & Practices 3

Question 1

A driller notices the rotary table is making an unusual grinding noise mid-shift. The correct safety action is to:

Accepted Answer

Stop drilling, shut down, and inspect before resuming

Answer

Unusual mechanical sounds indicate a potential equipment failure; operations must halt and the source investigated before work continues.

Question 2

What does the ANSI/AWWA A100 standard govern in well drilling safety?

Accepted Answer

Water well construction including materials and methods

Answer

ANSI/AWWA A100 is the primary standard for water well construction, covering casing, grouting, and construction practices that affect safety and water quality.

Question 3

When using a mobile crane to set casing on a drilling site, the ground bearing capacity must be evaluated because:

Accepted Answer

Soft or unstable ground can cause crane outrigger failure and tip-over

Answer

Crane tip-overs are commonly caused by outrigger pads sinking into soft ground, making ground stability assessment critical before lift operations.

Question 4

What is the purpose of a 'toolbox talk' conducted before each drilling shift?

Accepted Answer

To reinforce daily safety topics and address site-specific hazards

Answer

Toolbox talks are brief daily safety meetings that keep hazard awareness current, reinforce training, and address conditions specific to that day's work.

Question 5

Silica dust exposure during air rotary drilling of sandstone formations is regulated under OSHA's Silica Standard (29 CFR 1926.1153). The permissible exposure limit (PEL) for respirable crystalline silica is:

Accepted Answer

50 µg/m³ as an 8-hour TWA

Answer

OSHA's respirable crystalline silica PEL is 50 µg/m³ averaged over an 8-hour workday under 29 CFR 1926.1153.

(CWD) Certified Well Driller Practice Test

(CWD) Certified Well Driller Practice Test

CWD Safety Standards & Practices 3